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化工学报  2015 

市政污泥化学调理装置CFD模拟

DOI: 10.11949/j.issn.0438-1157.20150319, PP. 4145-4154

Keywords: 化学调理,气液两相流,计算流体力学,多重参考系方法,流体体积模型,搅拌容器

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Abstract:

市政污泥机械脱水前多采用化学调理,调理装置搅拌过程中的流场分布直接影响调理效果。采用多重参考系-流体体积模型对实验室污泥调理罐(内径为40cm)的流场特性进行计算流体力学(computationalfluiddynamics,CFD)模拟研究,验证了实验室调理罐模型气液两相分布情况。实验室调理罐的模拟结果表明:单层直桨叶调理罐的搅拌桨直径与调理罐内径比优化值为1:1.75,挡流板宽度与调理罐内径比优化值为1:20,可有效消除流体旋涡,增强湍动作用。在此基础上,对中试调理罐(内径为110cm)的流场特性进行模拟并与实际测量值校验。该研究采用的多重参考系-流体体积模型可为同类污泥调理罐设计与优化提供参考。

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